/*
 * Copyright 2007 Rob Nielsen
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 	http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.googlecode.proxymatic.apps.data.handlers;

import com.googlecode.proxymatic.apps.data.FieldNameCalculator;
import com.googlecode.proxymatic.core.AbstractMethodHandler;
import com.googlecode.proxymatic.core.BuildtimeContext;
import com.googlecode.proxymatic.core.MethodInvoker;
import com.googlecode.proxymatic.core.ProxyBuilder;
import com.googlecode.proxymatic.core.RuntimeContext;

import java.lang.reflect.Method;
import java.util.Map;

public class DataStoreMethodHandler extends AbstractMethodHandler implements MethodInvoker {
    public MethodInvoker getInvoker(Method method, BuildtimeContext context, ProxyBuilder proxyBuilder) {
        Class[] params = method.getParameterTypes();
        if (method.getName().startsWith("set") && params.length == 1 && method.getReturnType().equals(void.class)) {
            return this;
        }
        return NOT_HANDLED;
    }

    public Object invoke(Method method, Object[] parameters, RuntimeContext context) throws Throwable {
        Map backingMap = (Map) context.getImplementationObject(0);
        FieldNameCalculator fieldNameCalculator = (FieldNameCalculator) context.getImplementationObject(1);
        backingMap.put(fieldNameCalculator.getBackingMapKeyName(method), parameters[0]);
        return null;
    }

    public Class[] getExceptionTypes() {
        return NO_DECLARED_EXCEPTIONS;
    }
}
